CVE-2025-11964

Publication date 31 December 2025

Last updated 7 January 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

1.9 · Low

Score breakdown

Description

On Windows only, if libpcap needs to convert a Windows error message to UTF-8 and the message includes characters that UTF-8 represents using 4 bytes, utf_16le_to_utf_8_truncated() can write data beyond the end of the provided buffer.

Read the notes from the security team

Status

Package Ubuntu Release Status
libpcap 25.10 questing
Not affected
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

mdeslaur

windows-specific issue

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libpcap

Severity score breakdown

Parameter Value
Base score 1.9 · Low
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

References

Other references